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Basaltic dike, Puerto de La Aldea, Gran Canaria, Canary Islands.

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Photo ID: 685
Gallery ID: 62
Photo Title: Basaltic dike, Puerto de La Aldea, Gran Canaria, Canary Islands.
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Keywords:
basaltic dike, puerto de la aldea, gran canaria, canary islands, volcanic islands, atlantic islands, macaronesia, shield volcano, basalt, eruptive centre, fissure, central vent, feeder dike,
Description:
The initial formation of the island of Gran Canaria took place between 14.5 and 14.1 million years ago, during which time successive accumulations of very voluminous, fluid basaltic lavas, almost continuously extruded from several eruptive centres arising from fissures radiating out from a central vent located in the centre-west of the island, rapidly constructing an immense shield volcano reaching possibly 2000 metres altitude and which was somewhat similar in size to today’s island, this being known as the Tejeda volcano. These magmas originated from a reservoir situated below the oceanic crust at some 14 km depth. This is a basaltic dike located at the port of La Aldea, in the extreme west of Gran Canaria where many of the original basaltic formations are to be found. This dike was probably a feeder dike for an emission point in this area.
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